Valve-seat.



J. THOMPSON.

VALVE SEAT.

APPLIOATION FILED JULY 17, 1912.

Patented July 15, 1913.

Witnesses Attorneys JOHN THOMPSON, OF TAFT, CALIFORNIA, ASSIGNOR OFFORTY-NINE ONE-'HUNDREDTHS T0 GEORGEA. BARR, OF TAFI, CALIFORNIA.

VALVE-SEAT.

Specification of Letters Patent.

Patented July 15, 1913.

Application filed July 17', 1912. Serial No. 710,013.

Seat, of which the following is a specification.

The device forming the subject-matter of this application is a valveseat adapted to be employed in pumps which handle mud, slush, oil, andin structures where a fluidtight joint is required at the valve.

One object of the present invention is to provide a.- valve seat adaptedto retain a packing in a novel manner.

Another object of the invention is to provide novel means for directingthe movement of the valve, for facilitating a removal of the valve seat,and for holding the packing in place against lateral expansion.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of invention herein disclosed can be made within the scope ofwhat is claimed without departing from the spirit of the invention.

- In the drawings,-Figure 1 shows one form of the invention intransverse section; Fig. 2 is a top plan of the valve seat shown in Fig.1; Fig. 3 is a'bottom plan of the valve seat shown in Fig. 2; Fig. 1 isa transverse sectional detail showing a modified form of the invention;Fig. 5 is a transverse sectional detail showing a still furthermodification of the invention, and Fig. 6 is a bottom plan showing afurther modification.

In the accompanying drawings, the numeral 1 serves to indicategenerally, a portion of a pump, and the numeral 12 serves to indicategenerally, the valve seat. The valve seat 12 may be mounted in the pump1 in any desired manner, but in the present instance, the seat 12 isthreaded into the pump 1, as indicated at 2. The lower portion of thebore of the valve seat 12 flares as indicated at 3, and across theflaring portion 3 of the bore of the valve seat extends arms 4, of whichthere may be any number,

the arms 4 supporting a bearing 5. In the upper face of the valveseat 12there is a groove 6, defining inner and outer walls, denoted by thenumeral 7, there being a re 'silient packing 8 located in the groove 6and restrained laterally by the walls 7. The packing 8 preferably iscontinuous, although this detail is not insisted upon. The packing 8upstands above the upper face of the valve seat 12. Formed integrallywith the valve seat 12, and alined with the outer wall 7 are spacedfinger's 9, the inner faces of which slant downwardly and inwardly, asindicated at 10. There may be any number of the fingers 9, and theyexercise three functions. First, they serve as, a means for directingthe valve, hereinafter described, into engagement with the packing 8;secondly,

they constitute means for limiting the lateral expansion of the packing;and third, they constitute members adapted to be engaged by a wrench torotate the valve casm The valve structure may be of any form.

In the present instance, a stem 11 is mounted to reciprocate in thebearing 5, the stem carrying a valve 11, adapted to rest upon thepacking 8, and to be directed upon the packing by the slant faces 10 ofthe fingersl).

If desired, referring to Fig. 5, the valve seat 14 may be equipped witha lateral flange 15, adapted to overlie the upper edge of the pumpcylinder 1.

Referring to Fig. 4, it will be understood that the stem 16 may beformed integrally with the arms 17, the valve 18 being mounted to slideupon the stem.

If desired, as shown in Fig. 6, the valve seat may be provided in itslower face with recesses 14: which are adapted to receive the lugs of acollapsible wrench. The recesses 14 do not extendthrough the seat intothe threading, neither do they communicate with the packing-groove.

Having thus described the invention, what is claimed is 1. A valve seatcomprising an annular member having an annular groove in its upper face,the groove defining inner and outer walls; a resilient packing mountedin the groove and engaged laterally by the walls, the packing upstandingabove the walls; there being free ended fingers alined with andupstanding from the outer wall, the fingers constituting means fordirecting the packing into the groove, and the ends of the fingersconstituting means whereby the valve seat may be rotated.

2. In a device of the class described, a pump; an annular valve seatthreaded into the pump and provided in its upper face with an annulargroove defining spaced inner and outer walls; a resilient packingmounted in the groove and engaged laterally by the walls, the packingupstanding above the walls; there being free ended fingers upstandingfrom the seat, in alinement with the outer wall, the inner upright facesof the fingers slanting downwardly and inwardly; and a valve mounted toreciprocate in the pump, and to rest upon the packing;

the fingers constituting means for preventing lateral spreading of thepacking, and the ends of the fingers constituting means for facilitatingthe rotation of the valve seat, the slanting faces of the fingersconstituting means for directing the valve upon thepacking, andconstituting also, means for directing the packing into the groove.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

JOHN THOMPSON.

Witnesses i PAUL R. J. HEATH, B. M. PEARLMAN.

